MSD 85852 Iron Distributor Gear

I had to buy two of these because the first one broke during install. I normally ship my distributor's to MSD and let them install the gears, but I didn't do it this time and the gear ended up getting cracked. When pressing one of these on, do NOT press on the teeth. I know the teeth offer the most surface area to apply pressure, but use the very small collar (for lack of a better word) instead.

I bought a cheap gear that was machined incorrectly. I should have spent the extra few dollars and bought this gear first. This gear has the proper press fit for the 351W 0.531" shaft.

worked as it should

Did not fit